AKG APS4 Active Antenna and Power Splitter

The APS4 is what turns four separate wireless receivers into one antenna system. It takes the RF from a single pair of antennas, splits it four ways across 470 to 952 MHz, and sends DC back up the same BNC cables to power the connected receivers, so a four-channel rack loses eight whip antennas and most of its wall warts. Adjustable RF attenuation per path keeps levels right when the two antenna runs are different lengths or different cable types.

The rear panel supplies 10 V DC on each antenna input, enough for up to three active elements per path - an RA4000 B/W or SRA2 B/W antenna plus two AB4000 boosters, for instance - and adds two cascade outputs so up to three further APS4 units can hang off the first for a 16-channel system. It works with AKG's active and passive antennas alike. The half-rack metal chassis ships with the RMU4000 rack kit, two front-mount antenna cables and ten MK PS BNC cables, which is a complete install rather than a box that needs a shopping list.